Printing-telegraph



(No'ModeL) 3 Sheets-Sheet 1. S. V. ESSIGK.

PRINTING TELEGRAPH.

No. 534,639. Patented 'Feb. 26, 1895.

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No. 534,639. Patented Feb. 26,1895.

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N0. 534,639. Patented Feb. 26, 1895.

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SAMUEL V. ESSIOK, OF BROOKLYN, NEW YORK.

PRINTING-TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 534,639, dated February 26, 1895.

Application filed September 18 1890. Serial No. 365 ,320. (No model.)

To aZZ whom it may concern:

Be it known that I, SAMUEL VAN BUREN EssIoK, a citizen of the United States, residing at Brooklyn, county of Kings, and State of New York, have made a new and useful Invention in Printing-Telegraphs, of which the following is a specification.

My invention relates particularly to improvements in transmitters for use with printing telegraph instruments and analogous devices, and it will be fully understood by referring to the following specification and description and accompanying drawings, in which- Figure 1 is a plan view of my improved transmitter. Fig. 2 is a side elevational view, partly in section, of the same, as seen looking at Fig. lfrom left to right. Fig. 3 is a detail View of the pole changing apparatus. Figs. 4, 5, and 6 are detail views of my improved form of main line polar instrument designed for controlling the movement of the transmitter through the agency of delicate reversed currents. Fig. 7 isa diagrammatic view showing the electrical circuits, the polar instrument, the switches and the pole changer all operatively connected up in such a manner as to permit said parts to automatically con trol the movement of the transmitter.

The present application is directed to a transmitter adapted to transmit rapidly reversed currents over the line, and to subordinate details of construction hereinafter described, but particularly pointed out in the claims which follow this specification.

A is the base of the instrument.

B B B are the side sustaining frames which support the apparatus on said base.

L representsa series of key levers pivotall y secured on a cross bar uniting parts 13 B, each of said levers being provided with a detent H on its inner end lying in the path of one of the pins P spirally arranged around a rotary ranged in banks, and adapted to move vertically under the fingers of the operator, the free ends of said keys lying in the paths of the outer ends of the levers L.

R is a pivoted rod which carries a retaining bar V, having a hook-shaped notch near its free end adapted, when drawn forward under the influence of a spring 8', to retain any one of the key levers L in a depressed position, so that its free end and detent hook H lie in the path of that particular pin P corresponding to it.

T represents a push button for releasing the retaining bar when it is desired to allow the apparatus to run continuously.

G and G representa train of power impelled gearing adapted to give continuous rotary motion to the shaft when liberated.

F is a pivoted polarized armature lever permanently polarized by the main line current, the upper end of said armature lever having pallets ff adapted to release the escapement wheel E as the armature is vibrated under the influence of the main line magnets M. These coils M are also located in the main line circuit, as clearly shown in Fig. 7.

C G are adjustment screws adapted to adjust the relative positions of the main line coils M with relation to the armature F, so that the poles E E and E E of the magnet cores shall take a proper position with relation to said armature. These adjustment screws are secured to the coils by flatsided screw rods, and to the frame B by brackets B and have screws s adapted to retain the magnet coils in proper alignment.

The coils M are surrounded by metallicnonmagnetic tubes D, the function of which is to give increased magnetic effect to the cores E E and E E by preventing, as far as possible, any shunting of the magnetic lines of force.

The operation of the apparatus is as follows: So long as the key lever L is held in its depressed position by the hooked retaining bar V the apparatus remains inert, being held from movement by the detent hook H of that particular key lever and its corresponding pin P on the shaft 0. Suppose now that any other key lever L be depressed by the action of its key K; it will be noted that the beveled outer end of the lever so depressed will force the hooked retaining bar V into its rearward position and permit the key lever last depressed to be restored to its normal position, at the same time locking the key lever just depressed, whereupon the shaft 0 immediately commences to rotate under the influence of the gear train G, and as each one of the ratchet teeth of the ratchet wheel P (see Fig. 3) passes under the pallets of the lever Q, said lever, and hence the pole changer P, are vibrated, and each tooth causes the current impulses from battery BA to be transmitted over the line in one direction, while each succeeding tooth reverses the direction of said battery current, as will be clearly seen on examination of Fig. 7, wherein is shown the battery connected in such manner as to send a plus impulse through the binding post 19, wire pivotal core magnet M, wire w upper portion of switch Sw, wire w contact point p of the pole changer P, wire to, (shown in dotted lines,) wire 10, main coils m of the polar line magnet, wire 10, binding post I) to earth, and to the distant station, returning by way of the line to binding post Z), thence to Wire 111 wire to, (shown in dotted lines) contact point p of the pole changer, wire 'w lower portion of the switch Sw, wire w, to the other binding post 19, and, finally, to the negative pole of the battery. The next succeeding tooth will cause an impulse to be transmitted in the reverse direction as follows: Commencing at earth E, wire to, binding post b, wire 10, main coils M of the polar magnet, wire to, contact 29 of the pole changer (said pole changer being in its reversed position), wire lower portion of switch Sw, wire 20 binding post 1), battery BA,

second binding post 1), wire w coil M of the pivotal core magnet, wire n2 upper portion of the switch Sw, wire 10 contact pointp (the pole changer being in the position last described) wire 10 binding post I), to line, and return through the earth. It will be understood, however, that the switches Sw and Sw at the receiving station are in the reverse positions to those shown in Fig. 7, and that the electro-magnet of the receiving apparatus is in the branch wire 11) between the switch Sw and the earth, no receiving magnet being shown in this circuit in Fig. 7. It is readily apparent, therefore, that for each depression of a key the power impelled shaft 0 will be driven forward by the train of gear G a distance proportionate to the relative position of that pin P which corresponds to the key lever L depressed by its particular key K, and that, therefore, the pole changer P will cause the polar armature lever F to make one complete vibration for each pair of impulses transmitted, and that the pallets ff will, therefore, permit the forward advancement of the shaft 0 in successive steps, it being understood that the winding of the coils M and M is in such direction as to give the proper polarities to the pole pieces E E and E E and the armature F as the battery current is reversed through them.

I am aware that a transmitter has heretofore been devised in which a power impelled shaft was controlled in its rotation by a series of key levers having detent hooks adapted to check the rotation of the shaft at particular points of its rotation for each key lever, and that it was also old in the art to provide a locking bar for holding the key levers in a locked position when depressed, the locking bar automatically releasing the key lever last depressed on the depression of a succeeding key lever. I am not aware, however, that any one has heretofore combined the form of transmitter hereinbefore disclaimed with a pole changing device and circuit connections, and with an electromagnetic escapement so arranged that the transmitting shaft will rotate step by step after the depression of any key lever, whereby a uniform step by step rotation is imparted to the shaft, and alternating current impulses are simultaneously transmitted over the line to the receiving apparatus at the distant station.-

I do not limit myself, however, to the specific construction of the apparatus herein shown and described for accomplishing the several results sought, as it is obvious that there might be many modifications in the details of construction of the apparatus herein disclosed which would still come within the scope of my claims hereinafter made.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is

1. In atransmitter fora printing or analogous telegraphic system a power impelled shaft provided with spirally arranged stop pins; a series of pivoted key levers one for each pin; a series of sliding keys; a locking bar for locking any one or all of said keys in a depressed position; an escapement carried by the rotary shaft, a pole changer operatively connected with the shaft; a polar magnet having an armature carrying an escapement pallet and electrical connections, substantially as described.

2. In a telegraphic or analogous system, the combination of the following elements: a main line battery; a polar electro-magnet having three coils, all of which are connected in circuit in series with said battery, two of said coils constituting the magnet coils proper, and the third being operatively connected with and adapted to magnetize a pivoted armature located between the poles of the afore said magnet coils; and a pole changer and switch and circuit connections, substantially as described, whereby a single main line battery is caused to be automatically reversed over the line continuously.

3. In a printing or analogous telegraphic system a power impelled shaft operatively connected with a pole changer; a main line battery and a polar electro magnet having three coils two of which constitute the magnetizing coils of said electro-magnet and the third the magnetizing coil of a pivoted arma- IIO ture located between the poles of said magwith a pole changer and polarelectro-magnet 10 net coils, with electrical connections, subalso located at each end of the line, and elecstantially as described, whereby, so long as trical connections substantially as described, the power impelled shaft is permitted to rowhereby transmission is effected from either 5 tate, the battery is caused to be automatically end of the line as desired.

reversed on the line. SAMUEL V. ESSIOK.

4. In a printing telegraph or analogous sys- Witnesses: tem a single main line battery at each end of JAMES P. J. MORRIS,

the line; a two-point and single-point switch, A. V. HINEY. 

